Artificial tooth.



4GSIBLEEL'. ARTIFICIAL TOOTH. V11-"PLIUATI0I FILED HAY 1l. 1908.

INVNTOH L @Zd/nem, im

Patentsd Jan. 26, 1909.

GDEON SIBLEY, OF PHILADELPHIA, PENNSYLVANIA.

ARTIFICIAL TOOTH.

speciiicstion of Letters Patent.

Patented Jan. 26, 1909.

Application 1ed.,.&ay 12, 1908. Serial No. 432.344.

'To all whom it muy concern:

"Be it lgnown that I, GIDEON SiBLnY, a citizen of the United States, and resident of thccity and county of Philadelphia, and State of Pennsylvania, have invented certain new and' useful improvements in Artificial Teeth, of which the following is, e specification.

rThis iinven-tionrelates to' that class ofl artificial teeth wherein facings, of porcelain or the like, are detaehably secured. to a metallic backing, such, for example, :is illustrated in Lettcrs Patent of the United States, yNos. 651,388 and 792,618, dated J une 12, 1900 and June 20, i905. respectively, ofwhich l Aein tliea.ssignec.

'if'hepbject of the present invention is to produce, in artificial dcnttres, a novel and meritorious construction v.:liercby the tooth facing or fscings shall be rdadily and effectivelyintcrlockcdwith the backing, and yet be readily removable therefrom individually 'for repair, if necessity should require.

y,Accordingly,` my* invention stated generally, consists in providing the tooth-facing uit-h a rearuiardly-projecting loop, preferably of flat metal, and in providing the backing with a socket or recess, having at its mouth a depending pin, thc ports being so constructed and arranged relatively to each other that upon the application of the facing to the backing, the loop shell enter the recess and receive and embrace the pin in u. manner to insure the efficient intcrengngeincnt of the facing and backing, as will bc hereinafter described and claimed.

In the drawings-Figure i. is a front vieu' of a bridge embodying iny invention, on(` of the facings being omitted to cfq'iosc` the metallic backing. Fig 2 is s perspective view of one my iin roved tcotli-fscings, showing the loop on t e rear thereof. Fig. 3 is a similar View of e part of a plate or bucking, showing tlierecess oi socket :nid the retaining pin therein. Fig. et is avcrticel section through the associated facing sind backing, as on the line 4-4 of Fig. 1.

A is a facing of porcelain, or other refrac tory substance; and B the metallic backing therefor, which latter may constitute part of a crown, plate, bridge, or other basal portion. The facing is provided on its rear with an outwardly projecting rectangular loop, a, preferably of flat metal, the legs of which are embedded in the porcelain when molded,

' rearwardly, as indicated.

end then baked therein, so as to constitute, in effect, an integral part of the facing. The loo may be otherwise affixed to the facing, if desired.

rflie metallic backing has formed therein, bystiiinping or otherwise, a shallow socket o'r recess b, the bottoni t of which inclins from it's lower forward edge, upwardly and 'Ille width of this recess is cri-extensive with that of the out- Wardlv-projecting loop u, or substantially so.

ln the roof b, of the recess is iforincd :i von t'ical'uperture b3, through which extends lou gitudinally of the recess and ut the mouth thereof, a pin b4, the reduced end shouldered upper portion of which takes against, and is soldered or otherwise rigidly affixed to, the rear of the backing, as et ff. The outer 'face of the pin at the mouth of tho recess is flush with the front of the bucking, or solisten tinlly so, und is of a vidtli to enter snugly into and between the parallel legs ol' the loop, und be held therein by friction, the lower portion of tho pin being preferably beveled or inclined on its inner side, indicated. This portion of the pin terminates :it :i point above tlic lower edge of the recess.

The facing und bucking just described nre associated by entering the projecting loop into the lower portion of the recess of the bucking, and then forcibly pressing the facing upwardly with respect to the beckinc; e

suitable cement first having been applic to the contiguous surfaces of the parts. Thus the tint Walls of the loop embrace the depending portion of the pin, and by the wedgeike action of the beve ed surface of the latter upon the transverse liiiib of the loop, the loop is drawn. rearwardly into the recess :ind against the inclii'ied wall thereof, in u manner to force the facing into close Contact with the bucking und thc outer side of the pin, which, together with the lateral support afforded by the frictional engagement of the flat side of the loo i with the o )posingr surface of the pin und t ie lateral walls of the recess, insure an efficient interlocking oi' the facing and backing. Preferably, though not essentially, the lower edge of the backing is formed, as at li, to engage and protect the incisive end of the tooth. facing, when the lutter is apglicd.

y the construction hereinbefoie described, I provide a connection between the tooth facing or facings and the backing,

which, While sim le and eiective, permits the ready remova and renewal of any facing Without affecting the remainder of the denture.

I claim- 1. An artificial tooth comprising a facing of porcelain, or the like, having affixed thereto a rearwardly rojecting loop, in combination with a meta lic backing having a recess, and a retaining pin permanently secured at one end to said backing so as to depend at or adjacent the mouth of the recess, whereby the said loop, by relative movement of the facing and backing, can be seated Within the recess and en aged with the pin.

2. An art' cial tooth comprising a facing o porcelain, or the like, having affixed thereto a rearwardly projecting loop, in combination with a metallic backing having a recess with an inclined Wall, and a depending retaining in, said pin ernianently secured to the bac ing being a apted to enter the said loop when the latter is applied to the recess.

3. An artificial tooth comprising a facing of porcelain, or the like, having aiixed thereto a rearwardly projecting loop of fiat metal, in combination with a metallic backin having a recess with an inclined inner wal and of a wi'dth co-extensive with that of the loop, and a retaining pin aflxed to the backin and depending into the recess at the mouth t ereof, said pin being beveled on its inner side and being adapted to enter the said loop when the latter is applied to the recess.

4. An artificial tooth comprising a facing of porcelain, or the like, having affixed thereto a rearwardly-projecting loop, in combination with a metallic backin having a recess with an aperturd roof, an a retaining pin having a reduced shouldered portion extending through the aperture of the roof and rig- 'd y aiiixed to the backing, said pin being adapted to enter the said loop when the latter is applied to, the recess.

5. A backing for artificial teeth, comprising a metallic plate having a shallouT socket or recess, and a rigid pin permanently secured at one end to said late so as to depend at or adjacent the moutliof said socket or recess and terminate 'at a point above the lower edge thereof.

6. A backing for artificial teeth, compris n ing a metallic plate having a shallow socket or recess with an apertured roof, and a pin having a reduced shouldered tending through the aperture of t e roof and rigidly affixed to the plate, said pin depending at or adjacent the mouth of said socket or recess and terminating at a point above the lower edge thereof.

Signed at the city and county of Phila.- del hia, and State of Pennsylvania, this second) day of May, 1908.

GIDEON SIBLEY.

Witnesses:

E. C. KERDOLFF. JOHN R. NoLAN.

ortion ex- 4 

